Cardiff are hopeful of adding further players to their squad in the next few days.
Kanga is a product of the Paris Saint-Germain youth academy and played in Ligue Un with Angers.
He also played for Turkish First Division club Kayserispor, before scoring 18 goals in 35 games for Bern-based Swiss club Young Boys, where he gained Champions League and Uefa Conference League experience.
He joined Hertha on a four-year deal in July 2022 and last season was loaned out to Belgian club Standard Liege, scoring 12 goals in 32 appearances.
After earning one cap for Ivory Coast Under-20s, Kanga played for the France equivalent before making his senior international debut for the Ivorians in 2022 in a friendly against Togo, earning a second cap against Guinea
Though Kanga can play in a wide berth, it is expected that Cardiff manager Erol Bulut will use the 6ft 2in player as a centre-forward.
Bulut has targeted a striker as a priority in the summer transfer window.
Cardiff drew 1-1 with Hertha in a pre-season friendly last Thursday but Kanga did not feature for the Berlin side.
The Bluebirds continue their pre-season build-up on Wednesday with a friendly against Reading at the Cardiff City Stadium.
